Realistically speaking, it will not be possible with the sort of materials you could buy at a store to break whatever that code is. It would be easier to actually find whatever is broadcasting that. Literally.

Perhaps look for something at the store to help with decryption?

No. The only kind of thing that'd have equipment anywhere close to that wouldn't be a store. It'd be a government asset...

...you know...

...you could always report the signal to the police for suspicious activity. If it's government, they'll just ask you to stop kindly and thank you for your report, as recording suspicious activity to report is not illegal. If it is not, they will likely thank you for your report.

The letter possesses some symbols and special ink to verify that it is an official letter.

It reads:"From the Desk of the President:
Hello, this letter has been sent to you as you have passed the test.
What test you may ask. Why, the test of integrity. Would you report suspicious activity?
In these times, we need people who will trust their government and that their government can trust.
As such, a new off branch of certain programs is forming. A group of people who will be used to root out those who are opposed to the people of Alphim-Queol. A group of heroes, willing to work for their nation and people.

If you wish to join such a valiant effort to root out insidious activity that lurks beneath the surface, please go to the address listed on the back on the listed date at the noted time. We will be expecting you. Do note there will be mandatory training for the position.
-Leyler Erdel"

Tomorrow in the morning, instead of work the letter instructs you to report to a government building by a certain public transport. You decide to check a little closer, and find a ticket tucked behind one of the raised government emblems of the letter. The ticket looks unlike most tickets, with a dark coloration and white lettering.

(Vote: Take the job?)

Note:Show

You have been invited to a secret police force. This unlocks the job for future characters. Also, joining it will introduce some...different mechanics for accomplishing some jobs, as there will be more frequent decisions that will require active input.

You consider the chance of running into something unsavory along the way...unlikely but, it never hurt to be prepared. You also decide to purchase some formalwear this evening. Metal buckle just in case...

You don't actually own much...at all. You haven't really gone to events that require formal dress, or been a politician, or such. You spend 200 units to actually acquire some basic suit, tie, etc. 2722 units left.

You sleep and get up arise earlier than usual that morning, donning the formal clothing, including a suit, dress shoes, a tie, a black belt with a metallic buckle and a trilby. You tuck your ticket in the breast pocket and your pocket knife into your front right pants pocket.

You get to the public transport without issue, and the vehicle you board onto only has about 3 others on it, not counting staff. The transport vehicle did not appear to have windows that could be seen through on the outside, but you can view through them now that you are inside the vehicle. You know this is not typical of public transport vehicles.

The vehicle stops inside of a building. Strange. The building is quite bare and you are told to wait. You and the other three wait in a barren room with a couple of benches and a large 'airlock' set of doors, with one opening while the other stays closed. A staff member watches personally over the waiting room. They state that there are just a couple questions all of the accepted will be asked before taking the positions. The people accepted will then exit through another door.

You end up entering last. The setup is another barren room, with a chair, a table, and a screen with speakers.

It appears to be the face of the President.

The speakers emit voice. You wonder briefly if this was pre-recorded.

"Good morning, thank you for coming, indicating that you wish to take the position. There is an important question I must ask you though. Do you pledge to expressly follow my orders above all others, to value our nation over it's enemies, and to trust me over anyone else? Do you pledge to report suspicious activity you uncover under work or otherwise? Do you pledge to serve your president and government as set in the founding of this nation? In essence, I ask, are you willing to pledge yourself to utter loyalty to the office of the Presidency, which is granted the utmost degree of authority in all matters?"